It likely varies by region. In DC, mirelurks and mirelurk hunters were different species of crab and mirelurk kings were humanoid figures (Point Lookout, IIRC), while the same kings in New Vegas were the Lakelurks. In fallout 4, Mirelurk Hunters are now lobsters and mirelurk kings are more monkey-like in terms of movement than a human, and we now have the Mirelurk queens.

It's likely that when they first started to emerge, people called them under the same name because of their shared heritage (Crustaceans) despite being individual 'breeds' - like dogs versus German Shepards, Huskies and so forth.

Happened to me a couple weeks ago, audio just suddenly stopped. I flashed the BIOS and it worked, turns out my MOBO's default BIOS had compatibility issues with Windows 10. Maybe you should try updating the BIOS and see if that helps.